Subcaliber firearm.



PATENTED JUNE 30j 14903y G. H. HARRISON,

SUBCALIBER FIREARM. APPLIGATION FILED OOTL17. 1902.

No Melun..`

4 N VEN 70H Nrs-EEB STATES ramasse sans so, ieee.

GEORGE H. GARRis'oN, on RooKFoaniLLinois.

susoamsea Flessen/l.

y srnoiricn'rron forming pai-tof Letters Patent No. 732,540, dated almeno, 1903. i;

Application liied October 17, 1902. Serial No. 127,642. l (No model.)

To 1,Z whom/it may concern.- l

Be it known that I, GEORGE H. GARRisoN, a citizen of the United States, and a resident of Rockford, in the county of Winnebago and State of Illinois, have invented a new and` 'Improved Subcaliber Firearm, of which the following is a 'ull,clear, and exact description. My invention relates to subealiber firearms;

. and the object that l have in View is to provide an attachment or auxiliary means adapted to be placed in the breech of standard-gage rifles in order to make the firearm available fo'r usein discharging cartridges of smaller caliber.

, fthe barrel shown by- Fig. 2.

` A further object is to equip the insertible subcalib'er -device with means arranged `to receive thei'mpaet of the center-fire firing-pin of the main rifle and to transmit the force to the rim of a subcaliber cartridge.

A further object is to enable the parts of the subcaliber device to be easily assembled or separated and to provide for the ready extraction of the exploded cartridge-shell.

The further objeets'and advantages of the invention will appear in the course of the subjoined description and the novelty Will be defined -in the annexed claims.

Figure 1 is asectional elevation through a standard-gage firearm equipped with the subealiber device of my invention. Fig. 2 is an enlarged side elevation of the auxiliary barrel adapted for insertion in the chamber of the main barrel. Fig. 3 is a rear' elevation of Fig. 4 is a front elevation of the removable cap adapted to be fitted tothe breech of the subcaliber or auxiliary barrel. Fig. 5 is an enlarged sectional View through the breech eilt-he subealiber barrel shown by Figs. 1 and 2 to more clearly illustrate the extract-plate' in position to limit the insertion of a subealiber cartridge, and Figs. 6 and 7 are sectional views of other enibodiments of my invention.

'A designates the barrel of an ordinary rifle; B, the stock; C, the breeoh7block; D, the fir ing-pin mounted in the breech-block; F., the hammer, and F the trigger. It will be understood that these parts may be of anysuitable construction, and they are shown in Fig. 1 merely for the purpose of illustrating the application of my improved subcaliber mechanism, which will now be described.

5 designates the subealiber barrel, which Fig. 1.

in Fig. 2 is shown as provided with the collars G, said barrel' being of such size as Will readily enable it to be inserted into the chainber of the main barrel A, as represented by subcaliber barrel 5 is reduced to forni a tenon 7 and a shoulder 8 between thetenon and thebody of the barrel. The tenon is in axial alinenient with the barrel, and the bore Si of said barrel is extended or prolonged through the tenen.

By reference to Fig.' '3 it will bese-en that the'tenon is flattened on oppositesides, the flat faces of said tenon being indicated at 10, but the remaining portion of the tenon is provided With interrupted or broken screwthreads 11. v which is constructed for easy and quick application to or removal from the subcaliber barrel. This cap is in the forni of a cylinder having a head 13 at its rear end. 'The sleeve of said cap is provided with an internal mutilated thread 14, said thread being interrupted or broken by the gaps or spaces 15, the latter bein gl spaced and separated by the threads 14;, so as to correspond to the flattened faces 10 of the threaded tenon 7. 13 of the removable cap is provided With an inclined passage 1G, (see Fig. 1,) in 'which is arranged a supplemental firing-pin 17. This firing-pin occupies a diagonal position within the cap. in order that its front striking end may inipinge the riin of the cartridge, While the rear end of said supplemental firing-pin is at the middle of the head 13, whereby said The rear portion or breech of theA 12 (see Fig. 4) designates a cap- The head f iiring-pin 17 lies in the path of the iiring-pin D of the riiie. adopted to Alimit the play of the liring-pin in the cap, but, asl shown by Fig. 1, this pin is` engaged by a stop-screw 1S, secured in the Any suitable means may be head land arranged to fit in a groove or re- Vcap in a position for the'gaps or spaces 15 to lie opposite the threads 1.1 of the tenon, after which the cap is slipped endwise over the tenon, this movement of the cap taking place freely, because 'the threads 1i of the cap are opposite the flat faces 10 oi'A the tenon, While the threads 11 of the tenon oecupy the gaps or spaces l'of the cap. 1t is now necessary to turn the cap 12 a quarter-turin'and this4 'brings the threads 14 into interlocking engagementwith the threads 11, whereby the cap is easily and securely attached to the 4tenon at the breech of the subcalib'er barrel.

It is evident that the cap can Vbe readily removed from the barrel 5 when -it is desired to insert a cartridge into the chamber of said barrel 5; but after the. cartridge shall have been exploded thecap is rem'ovedin'order to displace the shell.

1 have provided an extractor adapted to displace the exploded shell from the breech fitted in a recess 20.

of the subcaliber barrel, and in Figs.- 1, 2, and 3 this extractor 19 lis-in the form of a fiat plate, which isarranged against one of the iiat sides of the breech-tenon and is 'loosely (Shown by dotted lines in Fig. 2 and by full lines in Fig. 1;) A stopscrew 21 is secured in the barrel 5 to play between certain shoulders on the exposed face ofthe extractor, the latter being provided with 'a lip 22, which is in the path of the cartridge-rim, as shown by Fig. 3.

barrel, it is received in the chamber and its rim impinges against the. lip 22-of the extractor, after which the cap 12 is iitted and connected to the breech-tenen.v The breech-` block C of therearm may now be adjusted 'into its active position to bring the iiring-pin D opposite to the supplemental pin 17. When the trigger is pulled, the hammer Estrikes the `pin D andthe latter impels thev 'pin 17 against the rim of the cartridge, thereby exploding the latter. The bore of the s'ubcaliber barrel is ,intended to be riiied, and the` bullet passes through the barrel 5 and thence lthrough the barrel. A, the bulletin its flight mental ring-pin 24, the latter being retained through said barrel A being free from Contact with theirifiin'g therein..

. In Fig. 6 I have shown another form of cap and supplemental firing-pin, but the extractor is notemployed in this construction. The cap 23 is secured to the `breech-'tenon of the subcaliber barrel 5, and in the'head of this screwcap, is arranged a diagonal supplein place by contracting the rear end portion of the inclined passage 25, vin which said pin 24 is slidably fitted. The contracted rear end When the cartridge is inserted into the subcaliber4 iiring-pin mounted in said cap.

of this passage 25 isindicated at 26, and it retains the firing-pin 24 against accidentalloss.

In the construction shown by Fig. 7 the capl 27 is provided with a transverse partition 28,

the latter serving to separate the front chan1-` ber 29 of the cap from'the rearchamber 30 thereof.

The partition 28 is provided with two passages 3]-, and in the smallchamber 30 l l of the cap is arranged a slidable firing-pin 32, the latter being provided with studs 33,v which are arranged to project through the passages 31 of the lpartition 28. The Ifiring-pin 32 is limited in its playin the cap 27 by a screw 34,-

secured in the cap 27 and projecting'into a groove 35 in the firing-pin. The firing-pin 32 is in the path of the main iring-pin D when the sub'caliber mechanism isinserted into the barrel A, and the .studs 3 3 of this 'firing-pin are adapted to strike the rim of the subcaliber/ cartridge.

Having vthus describedv -1ny invention, Iv

arranged to lie in the path of a cartridge-rim, means for confining the slidable extractorin place, a cap having detachable lconnection with the breech-tenen, and a supplemental 2.` A subcaliber inechanismfor firearms, comprising 'afsubcaliber barrel having, a 4

breech-tenen formed with fiat faces and with a mutilated thread', a cap-havin g a' mutilated 96 t .female thread and removably attached to said breech-tenen, a supplemental firing-pin supported by said cap, and an extractorslidably confined on one of the flat faces of the breechtenon. A v

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. GEORGE H, GARRIsoN.

Witnesses L. E. Soorr, NV.' S. MILLER.' 

